Once I was fighting with him, I stalled for a long time with dials and phase shields, then I have only one shield left and fire storm + bone yard in my hand. I thought I'll keep drawing until I get my graveyard and use rainstorm to seal the win, so I left myself open, not wanting to waste my shield. Then he blessed a deja vu that didn't divide to 11/11 and copied it about 6 times, and I died. That was a real surprise. Think about what would happen if he use all their skills the next turn. That's 132 damage on originating from that one deja vu alone.